Question: When did the IUCN conservation status of the Thylacine change to extinct?
Paraphrase: On what date did IUCN conservation status of the Thylacine change to extinct?
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q123102 p:P141 ?s . ?s ps:P141 wd:Q237350 . ?s pq:P746 ?value}